Select Debug Output Console from the pop-up menu to open the Debug Output window.
The OS_Printf function is used on the source code, and the results are output into the window.
See the manual included with the SDK for details on the OS_Printf function.

The menu operations available in the Debug Output Console are shown below.

[File]-[Save as...]

Outputs the Debug Output Console contents to a text file

[Edit]-[Clear]

Clears the Debug Output Console display.

[Setting]-[Output log to ...]

If this is selected without a check mark next to [Output log to ...], then a dialogue box to specify the output file name will open.
If a check mark is next to [Output log to ...] when this is selected, the check mark is removed and file output is stopped.
Even if the Debug Output Console is closed while the check mark is present, output to the file continues